Chart-holder



` taken upon the-line 5 5 of Fig. 2'.

plied. to the chart frame or holder.

iiiu'ren STATES PATENsr-QFFIfC-Ef-r COURTLANDT BABcooK, orsfioirimroit', coNNncTfI-o'url' i CHART-nonnen To all whom 15 mayconcern.' y j f Be it known that I, COURTLANDT W. BAB- cooK, a citizenof the United States, 'and a resident of Stonington, county ofNew'London, and .State of (onnecticut, have invented a new and ImprovedChart-Holder, of which the following is a full, clear, and exactdescription. K l VThis invention relates to chart and map holders. Theinvention portrays means :tor supporting charts and map holders to beused aboard ships. 7 An object' of the invention is topprovide a-.map orchart holder-which may beradjusted to'lit various-'lengths of charts andmaps.

videjan adjustable chart and map holding frame which will be adaptablefor use aboard vessels and ships of allkinds, vand which will takeupcoinparatively little space. A principal feature of the-inventioncenters in means for supporting and holding in taut condition the maporchart when ap'- 4Finally, it is an object, with others, to provide achart holder frame: which will be comparatively simple to construct,easy to adjustl in size, and convenient in mounting charts and mapsthereupon to expose said charts to view during navigation. j

. With the above principal objects, and others,in view the invention hasrelation to a certain combination and arrangement of parts, `an exampleof which isl disclosed in the following description, pointed out in theappended claims, and illustratedin the accompanying drawings, wherein: fFigure 1 shows a plan view of the chart holding frame with the chartremoved therefrom. Y Fig. 2 shows a plan view of the chart holding framewith thechart or map sheet attached thereto, andwith a fabric backingcarried on the frame. Y Y

Fig. 3 shows asectional view taken upon the line 3-3 of Fig. v1.

-' Fig. 4 shows a fragmentary sectional View taken upon the line le-.4of Fig. 2. Q f

Fig. 5 shows a fragmentary sectional view Fig. 6l shows Y a detailed Ysectional view taken upon the line 6 6 of Fig. 9.

Fig. A7 shows a detailed fragmentary'view of a certain hook employed forholding taut ste'cifieation of Letters raient.

It is also an objectief the invention to prothel fabric backin ein lo edfor su o'rtin the chart sheet. P A' pp Fig. 8 shows afperspective Viewof one end of' a `certain clamping bar employedy for fixing :the chartsheet to the frame.'

Fig. 9 .illustrates a sectionalview taken upon the liney 9-9 of Fig. f Y

A practical example,Jorembodiment, of the chart holder frame ris'illustrated -in 'the drawings as abovedescribed.- Theframemay beVconstructed principally of tubing which-carries an" inner framestructureof y A natenteduuig 1 3, 1920..'

iipfiiication ied July 29,1919. semina. 314,029. I

supporting rods made of wood if desired.

The primary frame'will be `composed of two telescoping parts so as toadjust "the apparatus iii-length. Upon this-frame i's'placed a backingsheet forj supporting-"the ychart sheet. u v Y A' Referring moreinpa'rtic'ular to the vdrawings, wherein thesame partsthroughout theseveral v-iews: are designatedby identical reference-characters, thereference numeral 10l points out two parallel tubesfor pipes Vjoined ditogether by-:a connecting tube 111. VThe ltubes 10 arek provided withapluralityy of'holes.l 12.

i A pin. 13 vis provided for each pip'elO. V` The pinmay belittedfinto'"any of. the plurality of h'olesf12. A wooden bar 14-is`securedito thepipe l11 by -bolts or other suitable means. A number of .cross framebarsrl -havefeach end' attached toi the tubes 10. Longitudinal barsljhave 'one 'endl thereof-'fixed fto they bar k121 and the other endthereof fixed to the forward bar 15 carried on-the lforward endpof thetubeslO. This frame just described `coinchart holding rack. 1l

l v prises'one of the 4vtelescoping unitsI of the the" tube 19 by boltsor othersuit'able means.

Longitudinal bars 22 have one end thereof attachedto the bar21, andrestin a supf ported relation upon the transverse bars 15 of theother` frameunit. The tubes 18 are telescopically1 confined within the tubes 10 suchthat the tworame units may undergo a sliding displacement one within theother. This permits the lengthening or shortening oftheffr'ame. i i

30 Y' the rubber faced har 21 by employing ap-v A compression spring isconfined with? in each tube 10 with one end thereof abutting the pin 13and the other end thereof abutting the inserted ends of the tubes 18.This compression spring keeps the two telescoping frame units inoutwardly disposed relation.v The pins 13 may be adjusted back and forthin any of the holes 12 so as to shorten or lengthen the assembled chartframe. Each longitudinal bar 22 is provided on 4the underneath surfaceVthereof with a dove-tail groove 26. This construction iS SllOWIlv indottedlines in Fig. 1 and further shown in Figs. 6 and 9. A bolt 27 isfixed in each transverse bar 15. This bolt will preferably have adove-tail head 28, and is slidably confined within the dove-tall groove26. This lines up the parts of the two frame units and makes a stiR andrigid structure, This construction permits the telescoping frame unit18.-22 with its associate trame parts to telescopically engage theotherframe unit 12 and transverse bars l5. .As the frame units are movedinwardly or outwardly to adjust the length of the chart frameV thelongitudinal ba1s22 are guidedupcn the transverse bars 15 by `engaoingthe bolt heads 28.

e fabric supportinT curtain or fabric backing 29, has one end thereofattached to propriete.hooks30` The other end of this support `curtain 29is passed over` the tube 11; and yhack under the frame. Avhook andringfconnection 31 are employed for fixing the support curtain to theunderneath'side ofthe central longitudinal bar le. This support curtainwill be drawn in taut relation so as to move the trame 18 intocompressive engagement withY the spring- 25.`

The voutward pressure of.y the spring will i* Y hold the supportingcurtain intautrelation causing it to stand in a straight line lacrossthe fece of, the entire length of the frame.

The above description essentially covers Y the construction of theadjustable chart supporting frame. v It will he understoodthat thisframe is primarily designed to accommodate various lengths of charts andmaps. The marine olicer will adjust the frame to suit the size ofi themap or chart which he expects. to use. on a particular voyage... Thechart 35 will then be applied to the frame as pointed out Figs. 2, e andQne end of the chart 3.5 is applied to the corrugated .rubber face ofthe bar 21, and the. other end ,of the chart will be placed. along thetube l1. Y A chartY clamping means. is employed for quickly andAadequately en aging the chart edges. along the bar 21and t ie. tube 11.This clamp is shown in perspective View in Fg- 8, and shown applied tothe. frame Figs. 2, i and 5. The clamp comprises a sprin yoke 36 Xed toa corrugated rubber face` bar 37. This bar 37 is applied to the chart35, and the yoke clamp 36 straddles the bar 2.1 and adjacent tube. Thisyoke clamp 36 Vforces the bar 37 into close engagement with the bar 21,''thus tightly clamping the paper or cloth `chart tightly therebetween.One. legV of 4the spring yoke 13 will be an arcuate sea-t 38 cutvthereinl for the purpose Of engaging the cylindrical body of the adjacent tube.. A similarwclampY is applied to the other end of the chartand tightly clamps the cha-rt to the'tube 11. This clamp com'- prises a'similar spring yoke 39 `fixed to a clamp bar 40, f,

Y The chart or inap 35is heldin taut condition between the ends oftheframe and rests in supported contact with the support curtain 2.9., 4Thecompression springs 25 act tokeep the two frame units in outwardlydisposed relation which constantly tightens the support curtain andchart Aor map 35.

This arrangement causes the chart 3 5 to be' placed under slight tensionat alltmeS, but the support curtain29 acts to relieve the chart 35 ofany undue tendency to stretch it out of shape or break or rend it at'any point.v

The clamps 36` aud-39 Vmuy be 'removedl andthe telescoping frameadjusted toanyV v new length and a new chart, either vshorten ory longerbut applied thereto as described. This yadjustablev chart frame rwilladequately fill thepresent'needon .board Ships for an adjustable chart.frame which willy be economical in spaceand'quick and conven-V ient inuse.y f v Having thus `described my invention,

. what I claim as new, and desire to secure by supporting frame,

telescopically f engagingV los to engage the inserted end of the tubularinserts, and adjusting pins provided within the tubular receivers of therst-frame to engage the compression springs for facili# tat-ing theadjustment of the length o the frame, and a support curtainixed to oneend of the frame and passed over the other end of the frame, with meansfor hooking theffifeel end of the curtain to the underneath side of oneframe unit.

Y 2. A chart vand map lsupporting iframe,

comprising in combination;` a; frame Vunit comprising parallel framebarsiitted with tubular receivers, and another frame uni'j comprisingparallel frame bars. fitted kwith tubular vinserts jtelescopicallyengaging within the tubular receivers of thev first ne f nsf

named frameunit, ay compressonspringinuo serted Within the telescopingtube members to engage the inserted end of the tubular inserts, andadjusting pins provided Within the tubular receivers of the first frameto engage the compression springs for facilitating the adjustment of thelength of the frame, and a support curtain fixed to one end of the frameand passed over the other a end of the frame, With means vfor hookingthe free end of the curtain to the underneath side of one frame unit,and a chart a plied to the support curtain with the ends thereofattached to the ends of theV frame, and clamps engaging each end of thechart.

3. A map and chart supporting rack, comprising Vin combination; a pairof telescoping frame units adjustably associated so as to Vary thelength of the chart frame, a chart holder bar applied to one frame unit,with a spring yoke clamp fitted to the chart holder bar vfor engagingy achart, and a spring yoke clamp fitted to the other end of the frame forengaging a chart, and a sup- With a spring yoke clamp fitted to thechartY holder bar for engaging a chart, and a spring yoke clamp fitted to theother end of the frame lforengaging Va'chart, a supporting curtainarranged to supportthe chart ory map, and provision for 'lengthening orshortening the support curtain ,when adjusting the chart frame toVarious lengths of charts and map s v COURTLANDT BABCOCK.

